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[Saggi Mizrahi <1432522@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

How to reproduce:
1. register a callable 
2. delete it
3. notify

Example output:

2015-03-16 10:39:07.600 ERROR neutron.callbacks.manager [req-0e06ab7e-12f4-4807-bbbe-a05d183a54f5 None None] Error during notification for dragonflow.neutron.services.l3.l3_controller_plugin.ControllerL3ServicePlugin.dvr_vmarp_table_update port, after_update
2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager Traceback (most recent call last):
2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager   File "/opt/stack/neutron/neutron/callbacks/manager.py", line 143, in _notify_loop
2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager     callback(resource, event, trigger, **kwargs)
2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager ReferenceError: weakly-referenced object no longer exists
2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager

** Affects: neutron
     Importance: Undecided
     Assignee: Saggi Mizrahi (ficoos)
         Status: In Progress

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https://bugs.launchpad.net/bugs/1432522

Title:
  weakref ReferenceError not handled in callback manager

Status in OpenStack Neutron (virtual network service):
  In Progress

Bug description:
  How to reproduce:
  1. register a callable 
  2. delete it
  3. notify

  Example output:

  2015-03-16 10:39:07.600 ERROR neutron.callbacks.manager [req-0e06ab7e-12f4-4807-bbbe-a05d183a54f5 None None] Error during notification for dragonflow.neutron.services.l3.l3_controller_plugin.ControllerL3ServicePlugin.dvr_vmarp_table_update port, after_update
  2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager Traceback (most recent call last):
  2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager   File "/opt/stack/neutron/neutron/callbacks/manager.py", line 143, in _notify_loop
  2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager     callback(resource, event, trigger, **kwargs)
  2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager ReferenceError: weakly-referenced object no longer exists
  2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager

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